Friction clutch



Sept. 9, 1930. H. D. MURRAY FRICTION CLUTCH Filed Oct. 28. 1927 2 sheets sheet 1 HHHH 7/ u NJ W v a Q m ll m A m of. ,A M L J u 1.4a m I. P L 1 Sept. 9, 1930.

H. DPMURRAY FRICT'ION qmu'cn Filed Oct. 28, L927 2 Sheets- 811a 2 ATTORNEYS.

Patented Sept. 9, 1930 UNITED STAT-ES HARRY n. MURRAY, or (move CITY, rEivNsY an A MEN 'IS, TO COOPEE-BESSEMER PORATION OF OHIO rmcrrioiv buffer:

Application filed. October 28, 1957'. seen K012591403.

Friction clutches are usually provided with friction surfaces which surfaces are brought into and out of engagement through the actures of the clutch, particularly in utilizing. a centrally arranged friction disc with movable friction elements at both sides of the disc so as to permit of the use of a disc with a balanced pressure on both sides thereof. Features and details of the invention will appear more fully from the specification and claims. A preferred embodiment of the invention is illustrated in the accompanying drawings as follows Fig. 1 shows a section'ofa portion of the clutch on the line 11 in Fig. l

Fig. 2 a section on the line 22 in Fig. 1. B marks the shaft on which the clutch is mounted. A fixed clutch member is provided with a hub A which is clamped on the shaft 25 by means ofclamping screws a and is also secured by a key a. Spokes A extend from the hub and a rim A is formed on the outer ends'of the spokes. The rim is provided with grooves a Friction shoes C C are mounted on the rim and these are provided with splines 0 interlocking with the grooves (2 thus looking the shoes against rotation on the rinibut permitting of their axial movement.

A friction disc D is arranged between the shoes and it is mounted on a member E which is journaled on the shaft B. The disc D is preferably made in two halves and secured to the member E by bolts F. It is provided with friction strips G of friction material. By making the disc D in parts it may be readily removed for the renewal of the friction strips.

The operating linkage of the clutch comprises the following mechainsm:--A sliding.

sleeve H is mounted on the shaftB and is Rock levers L and L are journaled on pins decanted in-the pins; mfibeingbelow fireman-paints K; The

levers L are bonnected'wit'li the *lever'sf -J, the ends N of the i levers L eirteriding" into sockets j in the levers J above the pivots Ki.

Blocks 0 are secured to the shoes CG by" means oescrews 0." These blocksareYad justed on the shoes by means of -sl'a'itns*"0- which make a convenient but very close adjustment. The blocks are locked against turning by pins 0 and are provided with notches 0 into which the ends Z ofthe levers L L extend.

The operation of the clutch is as follows: With the sleeve H in the position shown in Fig. l the clutch is set, the sleeve H being moved slightly inwardly suflicient to give to thethrust links I a slight inclination to lock the clutch in set position. clutch the sleeve H is moved outwardly. This draws the outer ends of the levers J inwardly I and rocks the pins m toward the right and the notches 5} toward the left, thus operating the levers L and L in opposite directions, the lower ends of the levers L to the right and the lower ends of the levers L toward the left. This swinging of the levers moves the upp'erends of the levers LL away from the disc D, carrying with them the shoes C and C so as to release the clutch. By reversing the movementof the sleeve H the reversal of the linkage and levers takes place, thus setting the clutch. It will be noted that the clutch is positively released and positively set through the action of the operating mechanism and that the central disc may be axially fixed and the friction shoes moved into engagement with it with a balancing pressure against both sides so that the member E is not subjected to axial thrust as the clutch is setand releasedi What I claim as new is 1. In a friction clutch, the combination of an intermediate friction member; clutch shoes at each side of the member; and means actuating said shoes simultaneously forcing said shoes into clutching engagement come s 'aii oonronnrlo r or iuoniv'r. vnrmon onro, con

To release the prising lock levers operating on the shoes, an operating sleeve, and connecting and actuating mechanism between the sleeve and levers, said mechanism comprising intermediate levers, thrust links between the intermediate levers and the sleeve, and connections from opposite sides of the pivots of the intermediate levers and the rock levers, said connections comprising direct interlocking members between one set of rock levers and the intermediate levers and links between the other set of rock levers and the intermediate levers.

2. In a friction clutch, the combination of a friction member in the form of a segmental disc; shoes at each side of the disc; a shoe carrier on which the shoes are splined; adjustable blocks on the shoes having notches; rock levers extending into the notches; intermediate levers; connections between the rock levers and intermediate levers, the connections to the intermediate levers being at opposite sides of the pivots of said intermediate levers; and means actuating the intermediate levers.

In testimony whereof I have hereunto set my hand.

HARRY D. MURRAY. 

